10-7-14 Current and Resistance

This is a simple application which is done by people with doctorates in Electrical Engineering from Harvard cannot do. One wire, one battery, and one light bulb. recognizing how to complete the circuit by attaching signal and ground

This box detects electric fields.

This picture reflects in laymen terms, what current is. It shows a closed loop and the position of electrons in the battery and the movement of energy and charge throughout the wires.

This is all that is required to make the light bulb shine bright like a diamond. A diamond with a light on it of course. 

This is the derivation of power. P=IV. The voltage that is carried in a current equates to the amount of joules per second, or the power of the process.

This picture is disturbing. The excercise is to show that the current is the same throughout. I have no idea how these inequalities could work out. This dumbfounded and in all honesty hurts my brain to look at.

These are a collection of ammeters. The are implemented into a circuit and measure the current. Current is measured in Amperes, which is a measurement Coulombs per second, or the change in charge over the change in time. Another equation for currant is that I=pqva. where v is the drift velocity, measured in meters/second. p is the number density, or the number of charges per unit volume (#/m^3). q is the magnitude of the charge, for example the magnitude of the charge on an electron is 1.602x10^-19. and finally a is cross sectional area perpendicular to the flow, measured in m^2. this is often known as a gauge for the wire.

This circuit uses an ammeter to measure the current, as well as a switch to open and close the circuit. It shows that without a complete loop there is no current and no voltage gets to any of the hardware.

This board is looked at a wire. it is measure charge relative to the volume of the wire and the number of charge carriers in the wire. It uses the conversion for current and implements it into the charge  and then calculates the drift velocity.

This graph shows the relationship between current and voltage. This relationship can be put in the form y=slope x as well it crosses through the origin, which is good.

In this exercise the slope of the line reflects well in OHM's law. The V=IR. This means that the slope of the line is the resistance, this is the resistance in the wire. 

• When a potential difference V is applied across the ends of a wire a steady current I quickly begins to flow. In different materials the amount of current that flows will be different even if the voltage is the same.
• The scattering of charge carriers off impurities, imperfections, and vibrations of the atomic lattice creates the resistance to the flow of charges in the wire.

These are three different positions and measuring the resistance in the wires. All of them behave ohmicly and show the relationship V=IR.

This is Georg Simon Ohm, he discovered Ohm's Law. He is an all around badass.

This is Ohm's Law.